Reports have surfaced of a bug in this month's patches from Microsoft. According to a series of anonymous posts on the AskWoody Lounge and additional reports on the Microsoft Dynamics Community forum, the recently released Internet Explorer 11.0.40 is causing rendering problems with Microsoft Dynamics CRM 2011, even with the latest Update Rollup 18 installed.

So far the only workaround involves using a different browser (impossible in many shops), dropping CRM 2011 back to IE7 compatibility mode (both speed and compatibility issues), or rolling back the bad patches. Alternatively you could upgrade to CRM 2016, but that’s taking a sledge-hammer-to-an-ant approach.